Shelly Plus 1 - Flickering Light : r/shellycloud

Lights flickering after installing dimmer : r/DIYUK

Shelly plus 2PM AND Shelly Dimmer 2 : r/ShellyUSA

Shelly One WIFI Switch - Scargill's Tech Blog

Shelly Plus 1 - Flickering Light : r/homeautomation

Shelly support group (English Version) Shelly 1L lights still flickering even with bypass

User manual Shelly WiFi Relay Switch (English - 2 pages)

Shelly support group (English Version), UPDATE: issue solved using this instuction

My Shelly Dimmer 2 has started to repeatedly turn on/off : r/shellycloud

Help] Shelly 1L flickering while off : r/shellycloud